#pragma once
#include "mysql.hpp"
#include "chat_session_member.hxx"
#include "chat_session_member-odb.hxx"


namespace wufan_im {
class ChatSessionMemeberTable {
    public:
    using ptr = std::shared_ptr<ChatSessionMemberTable>;
    ChatSessionMemeberTable(const std::shared_ptr<odb::core::database>& db)
    :_db(db)
    {}
    // 单个<会话,成员>的新增 -- ssid & uid
    // ChatSessionMember就相当于表的一列数据
    bool append(ChatSessionMember& csm) {
        try {
            odb::transaction trans(_db->begin());
            _db->persist(csm);
            trans.commit();
        } catch (std::exception& e) {
            LOG_ERROR("新增单会话成员失败 {}-{}:{}！", csm.session_id(), csm.user_id(), e.what());
            return false;
        }
        return true;
    }
    // 批量<会话,成员>的新增
    bool append(std::vector<ChantSessionMember>& csm_lists) {
        try {
            odb::transaction trans(_db->begin());
            for (auto& csm : csm_lists) {
                _db->persist(csm);
            }
            trans.commit();
        } catch (std::exception& e) {
            LOG_ERROR("新增多会话成员失败 {}-{}:{}！", csm_lists[0].session_id(), csm_lists.size(), e.what());
            return false;
        }
    }
    //删除指定会话中的指定成员 -- ssid & uid
    bool remove(ChatSessionMember &csm) {
        try {
            odb::transaction trans(_db->begin());
            typedef odb::query<ChatSessionMember> query;
            typedef odb::result<ChatSessionMember> result;
            _db->erase_query<ChatSessionMember>(query::session_id == csm.session_id() &&
                query::user_id == csm.user_id());
            trans.commit();
        }catch (std::exception &e) {
            LOG_ERROR("删除单会话成员失败 {}-{}:{}！", csm.session_id(), csm.user_id(), e.what());
            return false;
        }
        return true;
    }
    //删除会话的所有成员信息
    bool remove(const std::string &ssid) {
        try {
            odb::transaction trans(_db->begin());
            typedef odb::query<ChatSessionMember> query;
            typedef odb::result<ChatSessionMember> result;
            _db->erase_query<ChatSessionMember>(query::session_id == ssid);
            trans.commit();
        }catch (std::exception &e) {
            LOG_ERROR("删除会话所有成员失败 {}:{}！", ssid, e.what());
            return false;
        }
        return true;
    }
    std::vector<std::string> members(const std::string &ssid) {
        std::vector<std::string> res;
        try {
            odb::transaction trans(_db->begin());
            typedef odb::query<ChatSessionMember> query;
            typedef odb::result<ChatSessionMember> result;
            result r(_db->query<ChatSessionMember>(query::session_id == ssid));
            for (result::iterator i(r.begin()); i != r.end(); ++i) {
                res.push_back(i->user_id());
            }
            trans.commit();
        }catch (std::exception &e) {
            LOG_ERROR("获取会话成员失败:{}-{}！", ssid, e.what());
        }
    }
    return res;
}
    private:
       std::shared_ptr<odb::core::database> _db; 
};
}